Rotary jar



June 16, 1925. 1,542,319

R. McD. PYLES.

ROTARY JAR Original Filed Dec. 10

, g 1NVENTQ W 122190 Id J w 1 BY A flu/mi l ATTORNEY Patented June 16, 1925.

UNITED STATES 1,542,319 PATENT OFFICE.

IBDIBEBJT MODONALD PYLES, OI LONG BEACH, CALIFORNIA.

sonar um.

Un fication flied December 10, 1920, Seriallo. 429,68 5. Renewed November 11, 19.

To alldrlwmitma concern:

Be it known t at I, Rom-1m McDoNA m Prms, a citizen of the United States, residing at Lon Angeles an State of California, have invented a new and useful Rotary Jar, of which the following is a specificatlon.

My invention relates to a device to be employed with the rotary method of drilling oil or artesian wells and particularly comprises the provision of a jar adapted for use with the rotary method of drilling. In the drilling of oil or artesian wells it is not uncommon for the tools or apparatus being emplo ed in operation: to become jammed or wedged in the hole. ,With the standard or reciprocating method of drilling it has been the practice for some time to employ a device comprising two links as an aid in freeing the apparatus so jammed or wedged. In ,the art such devices have become known as jars and their operation has been terme i jarrin Wit the rotary method of drilling as distinguished from the standard or reclprocatory method, so far as I am aware, no apparatus or device will be found in the art for jarring. It is not uncommon with the rotary method of drilling to meet with aamminglor wedgi-ng of the drill string similar to t at experienced with the standard method of drilling. The principal object of my invention is to provide means for arrin adapted for usewith the rotary method .of drilling.

Such a device, to be practical for use with the rotary method of drilling, must maintain a rotatable connection between the string above and below the device. Further, such a device should not interrupt the-tubular passage formed by the rotary drillpipe.

A further object of m invention is to provide a rotary jar of the ind described which will be economical in manufacture a durable and safe in operation.

In the following specification and in the accompanying drawings I have disclosed a preferred mechanical embodiment of my invention.

In the drawings:

Figure 1 is a vertical elevation partly in section of a rotary jar embodying my invention, wherein the parts are illustrated with the drive member telescoped'to the lower limit within the driven member.

Fig. 2 is a verticalelevation of the device Beach, in the. county of Los illustrated in Fig. 1, but with the drive member withdrawn from the driven member to the uppermost limit.

Fig. 3 is a verticalelevation taken at right angles to Fig. 2 of the spaced clutch elements carried by the drive member.

. Fig. 4 is a fragmentary section of the up permost end of the'driven member illus-. trated in Figs. 1 and 2, illustrating the coo erating clutch members mounted within t e upper end of the driven member.

Fig. 5 is ahorizontal section taken on the line indicated by ww.

Referring to the drawings 2 indicates a driven member preferably taking the form of a section of ipe. A drive member 3 is formed prefera ly 'of a section of pipe of smaller diameter than the pipe 2; the memher 3 being telescopically slidable within the 5 on the sleeve 4. At its lower end the drive member 3 is provided with a clutch element 10 adapted to cooperate with the clutch element 6. In practice the head 8 and clutch element 10 are vpreferably screw threaded upon the drive member 3 and are keyed thereto by means of studs 11 and 12 respectively.

The device is assembled by insertin the upper end of the drive member 3 (wit the head 8 removed) through the driven member 2, from the lower end thereof upward,

until the upper end of the drive member 3 projects above the upper end of the driven member 2, whereupon the head 8 is threaded andkeyed in position. In operation the device is positioned at any desired oint in a string of drill pipe, by means 0 a collar screw threaded upon the threads 13 formed on the head 8 and by means of a second collar threaded upon the screwthreads 14 formed at the lower end of the driven member 2. In this position the device will comprise a portion of the drive string and. the tube-like structure of the members 2 and 3 will maintain the circulation channel or passage extending throughout the strin The gasket or washer 15 is mounted on t e lower end of the drive member 3 within the driven member 2 to insure that an liquid passing through the circulation c annel will not escape at the union between the members 2 and 3.

In case the string equipped with this device should become wedged or jammed the device enables the string. to be released by jarring. For example, the portion of the string below the devlce may be jarred down by elevating the portion of the string above the device until the drive member 3 has been withdrawn until it projects above the driven member 2 as illustrated in Fig. 2. The uper portion of the string may then be reeased or run downwardly with great rapidity and the portion of the string below the device will be." jarred violently upon the clutch element'9 striking the clutch element 5. To up, the portion of the string above the device is lowered until the drive member 3 is telescoped completely within the driven member 2 as illustrated in Fig.

1. If the portion of the string above the device be thereupon raised rapidly the striking of the clutch element 10 upon the clutch element 6 will produce a violent upward jarring of the portion of the string below the device. By re eating either the jarring up or jarring own as the case may be, the ortion of the string below the device will be ultimately loosened.

The spaced clutch elements 9 and 10 and the cooperating clutch elements 5 and 6 provide means for maintaining the rotatable connection between the drive and driven members. For example, if the parts of the device be in the position illustrated in 1, the rotatable connection will be mamtainedby the clutch element 9 engaging the clutch element 5 and if the'parts be in the position illustrated in Fig. 2 the rotatable connection will be maintained thro h the clutch elements 10a and 6. Preferab y the clutch elements have the form of ratchets as it is only necessary to maintain the r0- tatable connection in one direction of rotation in rotary drilling.

While I have heretofore set forth a preferred mechanical embodiment, of my invention, the latter is in no manner limited to the illustrated mechanical details of construction, and my invention contemplates a variation of form by the substitution of mechanical equivalents.

I claim:

A rotary. jar com rising a tubular drive section, and a tubu ar drlven section telescopically united for relative longitudinal movement, an abutment on one section having opposite clutch surfaces,'op-posed abutments on the other section having clutch surfaces for alternate coo eration with the clutch surfaces of said rst named abutment, said opposedabutments being relatively spaced to permit longitudinal slidin of one section upon the other to forcefu ly dash the cooperatin clutch surfaces together on opposlte stro es of'the drive section and the cooperating clutch surfaces being formed to intermesh to establish rotary connection of the two sections at o po drive section.

Signed at Los Angeles, California this 2d day of December 1920.

ROBERT MoDQNALD PYLES.

Witnesses:

Lnormnn S. LYON, L. 13mm WEAVER. I

7e site ends of the longitudinal stroke 0 the 

